{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-76234", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-19T11:36:02.574Z", "datePublished": "2026-08-19T14:02:14.481Z", "dateUpdated": "2026-08-19T14:02:14.481Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-19T14:02:14.481Z"}, "datePublic": "2026-02-12T00:00:00.000Z", "title": "libcrux before 0.0.6 Cryptographic Implementation Bug Fixes", "descriptions": [{"lang": "en", "value": "libcrux-ecdh and libcrux-ed25519 before 0.0.6, and libcrux-psq before 0.0.7, contain cryptographic implementation bugs. libcrux-ecdh did not properly check length and clamping during X25519 secret validation (and had a broken clamping check for imported X25519 secret keys); libcrux-ed25519 performed a duplicated clamping step during key generation; and libcrux-psq panicked instead of propagating an AEADError. These were fixed in the respective patched releases."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Verification of Cryptographic Signature", "cweId": "CWE-347", "type": "CWE"}]}], "affected": [{"vendor": "celabshq", "product": "libcrux", "defaultStatus": "unaffected", "packageURL": "pkg:cargo/libcrux-ecdh", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "0.0.6"}, {"version": "0.0.6", "status": "unaffected", "versionType": "semver"}]}, {"vendor": "celabshq", "product": "libcrux", "defaultStatus": "unaffected", "packageURL": "pkg:cargo/libcrux-ed25519", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "0.0.6"}, {"version": "0.0.6", "status": "unaffected", "versionType": "semver"}]}, {"vendor": "celabshq", "product": "libcrux", "defaultStatus": "unaffected", "packageURL": "pkg:cargo/libcrux-psq", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "0.0.7"}, {"version": "0.0.7", "status": "unaffected", "versionType": "semver"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 8.7, "baseSeverity": "HIGH", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS"}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "format": "CVSS"}], "references": [{"url": "https://github.com/celabshq/libcrux/security/advisories/GHSA-435g-fcv3-8j26", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-435g-fcv3-8j26)"}, {"name": "VulnCheck Advisory: libcrux before 0.0.6 Cryptographic Implementation Bug Fixes", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/libcrux-before-cryptographic-implementation-bug-fixes"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageURL": "pkg:cargo/libcrux-ecdh", "product": "libcrux", "vendor": "celabshq", "versions": [{"lessThan": "0.0.6", "status": "affected", "version": "0", "versionType": "semver"}, {"status": "unaffected", "version": "0.0.6", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "packageURL": "pkg:cargo/libcrux-ed25519", "product": "libcrux", "vendor": "celabshq", "versions": [{"lessThan": "0.0.6", "status": "affected", "version": "0", "versionType": "semver"}, {"status": "unaffected", "version": "0.0.6", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "packageURL": "pkg:cargo/libcrux-psq", "product": "libcrux", "vendor": "celabshq", "versions": [{"lessThan": "0.0.7", "status": "affected", "version": "0", "versionType": "semver"}, {"status": "unaffected", "version": "0.0.7", "versionType": "semver"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "libcrux-ecdh and libcrux-ed25519 before 0.0.6, and libcrux-psq before 0.0.7, contain cryptographic implementation bugs. libcrux-ecdh did not properly check length and clamping during X25519 secret validation (and had a broken clamping check for imported X25519 secret keys); libcrux-ed25519 performed a duplicated clamping step during key generation; and libcrux-psq panicked instead of propagating an AEADError. These were fixed in the respective patched releases."}], "id": "CVE-2026-76234", "lastModified": "2026-08-19T14:17:52.797", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "disclosure@vulncheck.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}]}, "published": "2026-08-19T14:17:52.797", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/celabshq/libcrux/security/advisories/GHSA-435g-fcv3-8j26"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/libcrux-before-cryptographic-implementation-bug-fixes"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-347"}], "source": "disclosure@vulncheck.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.0.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "0.0.6"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "libcrux", "source": "cna", "vendor": "celabshq"}, "product": "libcrux", "vendor": "celabshq"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.0.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "0.0.7"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "libcrux", "source": "cna", "vendor": "celabshq"}, "product": "libcrux", "vendor": "celabshq"}], "created": "2026-08-19T19:00:05.217503+00:00", "updated": "2026-08-20T09:10:10.621674+00:00", "vendors": ["celabshq", "celabshq$PRODUCT$libcrux"]}